<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 表单 -->
      <el-form
        ref="loginFormRef"
        class="login_form"
        :model="loginForm"
        :rules="loginFormRules"
      >
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            type="password"
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
          ></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="reset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
  data() {
    return {
      //表单数据
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      //表单验证
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            // pattern: /^[0-9a-zA-Z]{3,10}$/,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            pattern: /^[0-9a-zA-Z]{6,15}$/,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    //登录
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        //请求接口验证
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) {
          this.$message.error(res.meta.msg)
        } else {
          this.$message.success(res.meta.msg)
          //保存登录token
          window.sessionStorage.setItem('token', res.data.token)
          this.$router.push('/home')
        }
      })
    },
    //清空表单信息
    reset() {
      this.$refs.loginFormRef.resetFields()
      this.loginForm.username = ''
      this.loginForm.password = ''
    },
  },
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;

  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
      height: 130px;
      width: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }

    .btns {
      display: flex;
      justify-content: space-around;
    }
  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 30px;
    box-sizing: border-box;
  }
}
</style>
